4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/ldlm/ldlm_lockd.c
38 * Author: Peter Braam <braam@clusterfs.com>
39 * Author: Phil Schwan <phil@clusterfs.com>
42 #define DEBUG_SUBSYSTEM S_LDLM
45 # include <libcfs/libcfs.h>
47 # include <liblustre.h>
50 #include <lustre_dlm.h>
51 #include <obd_class.h>
52 #include <libcfs/list.h>
53 #include "ldlm_internal.h"
55 static int ldlm_num_threads;
56 CFS_MODULE_PARM(ldlm_num_threads, "i", int, 0444,
57 "number of DLM service threads to start");
59 static char *ldlm_cpts;
60 CFS_MODULE_PARM(ldlm_cpts, "s", charp, 0444,
61 "CPU partitions ldlm threads should run on");
63 extern cfs_mem_cache_t *ldlm_resource_slab;
64 extern cfs_mem_cache_t *ldlm_lock_slab;
65 static cfs_mutex_t ldlm_ref_mutex;
66 static int ldlm_refcount;
68 struct ldlm_cb_async_args {
69 struct ldlm_cb_set_arg *ca_set_arg;
70 struct ldlm_lock *ca_lock;
75 static struct ldlm_state *ldlm_state;
77 inline cfs_time_t round_timeout(cfs_time_t timeout)
79 return cfs_time_seconds((int)cfs_duration_sec(cfs_time_sub(timeout, 0)) + 1);
82 /* timeout for initial callback (AST) reply (bz10399) */
83 static inline unsigned int ldlm_get_rq_timeout(void)
86 unsigned int timeout = min(ldlm_timeout, obd_timeout / 3);
88 return timeout < 1 ? 1 : timeout;
93 #define ELT_TERMINATE 2
96 cfs_spinlock_t blp_lock;
99 * blp_prio_list is used for callbacks that should be handled
100 * as a priority. It is used for LDLM_FL_DISCARD_DATA requests.
103 cfs_list_t blp_prio_list;
106 * blp_list is used for all other callbacks which are likely
107 * to take longer to process.
111 cfs_waitq_t blp_waitq;
112 cfs_completion_t blp_comp;
113 cfs_atomic_t blp_num_threads;
114 cfs_atomic_t blp_busy_threads;
119 struct ldlm_bl_work_item {
120 cfs_list_t blwi_entry;
121 struct ldlm_namespace *blwi_ns;
122 struct ldlm_lock_desc blwi_ld;
123 struct ldlm_lock *blwi_lock;
124 cfs_list_t blwi_head;
126 cfs_completion_t blwi_comp;
128 int blwi_mem_pressure;
131 #if defined(HAVE_SERVER_SUPPORT) && defined(__KERNEL__)
133 /* w_l_spinlock protects both waiting_locks_list and expired_lock_thread */
134 static cfs_spinlock_t waiting_locks_spinlock; /* BH lock (timer) */
135 static cfs_list_t waiting_locks_list;
136 static cfs_timer_t waiting_locks_timer;
138 static struct expired_lock_thread {
139 cfs_waitq_t elt_waitq;
142 cfs_list_t elt_expired_locks;
143 } expired_lock_thread;
145 static inline int have_expired_locks(void)
150 cfs_spin_lock_bh(&waiting_locks_spinlock);
151 need_to_run = !cfs_list_empty(&expired_lock_thread.elt_expired_locks);
152 cfs_spin_unlock_bh(&waiting_locks_spinlock);
157 static int expired_lock_main(void *arg)
159 cfs_list_t *expired = &expired_lock_thread.elt_expired_locks;
160 struct l_wait_info lwi = { 0 };
164 cfs_daemonize("ldlm_elt");
166 expired_lock_thread.elt_state = ELT_READY;
167 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
170 l_wait_event(expired_lock_thread.elt_waitq,
171 have_expired_locks() ||
172 expired_lock_thread.elt_state == ELT_TERMINATE,
175 cfs_spin_lock_bh(&waiting_locks_spinlock);
176 if (expired_lock_thread.elt_dump) {
177 struct libcfs_debug_msg_data msgdata = {
178 .msg_file = __FILE__,
179 .msg_fn = "waiting_locks_callback",
180 .msg_line = expired_lock_thread.elt_dump };
181 cfs_spin_unlock_bh(&waiting_locks_spinlock);
183 /* from waiting_locks_callback, but not in timer */
184 libcfs_debug_dumplog();
185 libcfs_run_lbug_upcall(&msgdata);
187 cfs_spin_lock_bh(&waiting_locks_spinlock);
188 expired_lock_thread.elt_dump = 0;
193 while (!cfs_list_empty(expired)) {
194 struct obd_export *export;
195 struct ldlm_lock *lock;
197 lock = cfs_list_entry(expired->next, struct ldlm_lock,
199 if ((void *)lock < LP_POISON + CFS_PAGE_SIZE &&
200 (void *)lock >= LP_POISON) {
201 cfs_spin_unlock_bh(&waiting_locks_spinlock);
202 CERROR("free lock on elt list %p\n", lock);
205 cfs_list_del_init(&lock->l_pending_chain);
206 if ((void *)lock->l_export < LP_POISON + CFS_PAGE_SIZE &&
207 (void *)lock->l_export >= LP_POISON) {
208 CERROR("lock with free export on elt list %p\n",
210 lock->l_export = NULL;
211 LDLM_ERROR(lock, "free export");
212 /* release extra ref grabbed by
213 * ldlm_add_waiting_lock() or
214 * ldlm_failed_ast() */
215 LDLM_LOCK_RELEASE(lock);
219 if (lock->l_destroyed) {
220 /* release the lock refcount where
221 * waiting_locks_callback() founds */
222 LDLM_LOCK_RELEASE(lock);
225 export = class_export_lock_get(lock->l_export, lock);
226 cfs_spin_unlock_bh(&waiting_locks_spinlock);
229 class_fail_export(export);
230 class_export_lock_put(export, lock);
232 /* release extra ref grabbed by ldlm_add_waiting_lock()
233 * or ldlm_failed_ast() */
234 LDLM_LOCK_RELEASE(lock);
236 cfs_spin_lock_bh(&waiting_locks_spinlock);
238 cfs_spin_unlock_bh(&waiting_locks_spinlock);
240 if (do_dump && obd_dump_on_eviction) {
241 CERROR("dump the log upon eviction\n");
242 libcfs_debug_dumplog();
245 if (expired_lock_thread.elt_state == ELT_TERMINATE)
249 expired_lock_thread.elt_state = ELT_STOPPED;
250 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
254 static int ldlm_add_waiting_lock(struct ldlm_lock *lock);
255 static int __ldlm_add_waiting_lock(struct ldlm_lock *lock, int seconds);
258 * Check if there is a request in the export request list
259 * which prevents the lock canceling.
261 static int ldlm_lock_busy(struct ldlm_lock *lock)
263 struct ptlrpc_request *req;
267 if (lock->l_export == NULL)
270 cfs_spin_lock_bh(&lock->l_export->exp_rpc_lock);
271 cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
273 if (req->rq_ops->hpreq_lock_match) {
274 match = req->rq_ops->hpreq_lock_match(req, lock);
279 cfs_spin_unlock_bh(&lock->l_export->exp_rpc_lock);
283 /* This is called from within a timer interrupt and cannot schedule */
284 static void waiting_locks_callback(unsigned long unused)
286 struct ldlm_lock *lock;
289 cfs_spin_lock_bh(&waiting_locks_spinlock);
290 while (!cfs_list_empty(&waiting_locks_list)) {
291 lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock,
293 if (cfs_time_after(lock->l_callback_timeout,
294 cfs_time_current()) ||
295 (lock->l_req_mode == LCK_GROUP))
298 if (ptlrpc_check_suspend()) {
299 /* there is a case when we talk to one mds, holding
300 * lock from another mds. this way we easily can get
301 * here, if second mds is being recovered. so, we
302 * suspend timeouts. bug 6019 */
304 LDLM_ERROR(lock, "recharge timeout: %s@%s nid %s ",
305 lock->l_export->exp_client_uuid.uuid,
306 lock->l_export->exp_connection->c_remote_uuid.uuid,
307 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
309 cfs_list_del_init(&lock->l_pending_chain);
310 if (lock->l_destroyed) {
311 /* relay the lock refcount decrease to
312 * expired lock thread */
313 cfs_list_add(&lock->l_pending_chain,
314 &expired_lock_thread.elt_expired_locks);
316 __ldlm_add_waiting_lock(lock,
317 ldlm_get_enq_timeout(lock));
322 /* if timeout overlaps the activation time of suspended timeouts
323 * then extend it to give a chance for client to reconnect */
324 if (cfs_time_before(cfs_time_sub(lock->l_callback_timeout,
325 cfs_time_seconds(obd_timeout)/2),
326 ptlrpc_suspend_wakeup_time())) {
327 LDLM_ERROR(lock, "extend timeout due to recovery: %s@%s nid %s ",
328 lock->l_export->exp_client_uuid.uuid,
329 lock->l_export->exp_connection->c_remote_uuid.uuid,
330 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
332 cfs_list_del_init(&lock->l_pending_chain);
333 if (lock->l_destroyed) {
334 /* relay the lock refcount decrease to
335 * expired lock thread */
336 cfs_list_add(&lock->l_pending_chain,
337 &expired_lock_thread.elt_expired_locks);
339 __ldlm_add_waiting_lock(lock,
340 ldlm_get_enq_timeout(lock));
345 /* Check if we need to prolong timeout */
346 if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT) &&
347 ldlm_lock_busy(lock)) {
350 if (lock->l_pending_chain.next == &waiting_locks_list)
355 cfs_spin_unlock_bh(&waiting_locks_spinlock);
356 LDLM_DEBUG(lock, "prolong the busy lock");
357 ldlm_refresh_waiting_lock(lock,
358 ldlm_get_enq_timeout(lock));
359 cfs_spin_lock_bh(&waiting_locks_spinlock);
362 LDLM_LOCK_RELEASE(lock);
366 LDLM_LOCK_RELEASE(lock);
369 ldlm_lock_to_ns(lock)->ns_timeouts++;
370 LDLM_ERROR(lock, "lock callback timer expired after %lds: "
371 "evicting client at %s ",
372 cfs_time_current_sec()- lock->l_last_activity,
374 lock->l_export->exp_connection->c_peer.nid));
376 /* no needs to take an extra ref on the lock since it was in
377 * the waiting_locks_list and ldlm_add_waiting_lock()
378 * already grabbed a ref */
379 cfs_list_del(&lock->l_pending_chain);
380 cfs_list_add(&lock->l_pending_chain,
381 &expired_lock_thread.elt_expired_locks);
385 if (!cfs_list_empty(&expired_lock_thread.elt_expired_locks)) {
386 if (obd_dump_on_timeout && need_dump)
387 expired_lock_thread.elt_dump = __LINE__;
389 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
393 * Make sure the timer will fire again if we have any locks
396 if (!cfs_list_empty(&waiting_locks_list)) {
397 cfs_time_t timeout_rounded;
398 lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock,
400 timeout_rounded = (cfs_time_t)round_timeout(lock->l_callback_timeout);
401 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
403 cfs_spin_unlock_bh(&waiting_locks_spinlock);
407 * Indicate that we're waiting for a client to call us back cancelling a given
408 * lock. We add it to the pending-callback chain, and schedule the lock-timeout
409 * timer to fire appropriately. (We round up to the next second, to avoid
410 * floods of timer firings during periods of high lock contention and traffic).
411 * As done by ldlm_add_waiting_lock(), the caller must grab a lock reference
412 * if it has been added to the waiting list (1 is returned).
414 * Called with the namespace lock held.
416 static int __ldlm_add_waiting_lock(struct ldlm_lock *lock, int seconds)
419 cfs_time_t timeout_rounded;
421 if (!cfs_list_empty(&lock->l_pending_chain))
424 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT) ||
425 OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT))
428 timeout = cfs_time_shift(seconds);
429 if (likely(cfs_time_after(timeout, lock->l_callback_timeout)))
430 lock->l_callback_timeout = timeout;
432 timeout_rounded = round_timeout(lock->l_callback_timeout);
434 if (cfs_time_before(timeout_rounded,
435 cfs_timer_deadline(&waiting_locks_timer)) ||
436 !cfs_timer_is_armed(&waiting_locks_timer)) {
437 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
439 /* if the new lock has a shorter timeout than something earlier on
440 the list, we'll wait the longer amount of time; no big deal. */
442 cfs_list_add_tail(&lock->l_pending_chain, &waiting_locks_list);
446 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
449 int timeout = ldlm_get_enq_timeout(lock);
451 /* NB: must be called with hold of lock_res_and_lock() */
452 LASSERT(lock->l_res_locked);
455 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
457 cfs_spin_lock_bh(&waiting_locks_spinlock);
458 if (lock->l_destroyed) {
459 static cfs_time_t next;
460 cfs_spin_unlock_bh(&waiting_locks_spinlock);
461 LDLM_ERROR(lock, "not waiting on destroyed lock (bug 5653)");
462 if (cfs_time_after(cfs_time_current(), next)) {
463 next = cfs_time_shift(14400);
464 libcfs_debug_dumpstack(NULL);
469 ret = __ldlm_add_waiting_lock(lock, timeout);
471 /* grab ref on the lock if it has been added to the
475 cfs_spin_unlock_bh(&waiting_locks_spinlock);
478 cfs_spin_lock_bh(&lock->l_export->exp_bl_list_lock);
479 if (cfs_list_empty(&lock->l_exp_list))
480 cfs_list_add(&lock->l_exp_list,
481 &lock->l_export->exp_bl_list);
482 cfs_spin_unlock_bh(&lock->l_export->exp_bl_list_lock);
485 LDLM_DEBUG(lock, "%sadding to wait list(timeout: %d, AT: %s)",
486 ret == 0 ? "not re-" : "", timeout,
487 AT_OFF ? "off" : "on");
492 * Remove a lock from the pending list, likely because it had its cancellation
493 * callback arrive without incident. This adjusts the lock-timeout timer if
494 * needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
495 * As done by ldlm_del_waiting_lock(), the caller must release the lock
496 * reference when the lock is removed from any list (1 is returned).
498 * Called with namespace lock held.
500 static int __ldlm_del_waiting_lock(struct ldlm_lock *lock)
502 cfs_list_t *list_next;
504 if (cfs_list_empty(&lock->l_pending_chain))
507 list_next = lock->l_pending_chain.next;
508 if (lock->l_pending_chain.prev == &waiting_locks_list) {
509 /* Removing the head of the list, adjust timer. */
510 if (list_next == &waiting_locks_list) {
511 /* No more, just cancel. */
512 cfs_timer_disarm(&waiting_locks_timer);
514 struct ldlm_lock *next;
515 next = cfs_list_entry(list_next, struct ldlm_lock,
517 cfs_timer_arm(&waiting_locks_timer,
518 round_timeout(next->l_callback_timeout));
521 cfs_list_del_init(&lock->l_pending_chain);
526 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
530 if (lock->l_export == NULL) {
531 /* We don't have a "waiting locks list" on clients. */
532 CDEBUG(D_DLMTRACE, "Client lock %p : no-op\n", lock);
536 cfs_spin_lock_bh(&waiting_locks_spinlock);
537 ret = __ldlm_del_waiting_lock(lock);
538 cfs_spin_unlock_bh(&waiting_locks_spinlock);
540 /* remove the lock out of export blocking list */
541 cfs_spin_lock_bh(&lock->l_export->exp_bl_list_lock);
542 cfs_list_del_init(&lock->l_exp_list);
543 cfs_spin_unlock_bh(&lock->l_export->exp_bl_list_lock);
546 /* release lock ref if it has indeed been removed
548 LDLM_LOCK_RELEASE(lock);
551 LDLM_DEBUG(lock, "%s", ret == 0 ? "wasn't waiting" : "removed");
558 * Called with namespace lock held.
560 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
562 if (lock->l_export == NULL) {
563 /* We don't have a "waiting locks list" on clients. */
564 LDLM_DEBUG(lock, "client lock: no-op");
568 cfs_spin_lock_bh(&waiting_locks_spinlock);
570 if (cfs_list_empty(&lock->l_pending_chain)) {
571 cfs_spin_unlock_bh(&waiting_locks_spinlock);
572 LDLM_DEBUG(lock, "wasn't waiting");
576 /* we remove/add the lock to the waiting list, so no needs to
577 * release/take a lock reference */
578 __ldlm_del_waiting_lock(lock);
579 __ldlm_add_waiting_lock(lock, timeout);
580 cfs_spin_unlock_bh(&waiting_locks_spinlock);
582 LDLM_DEBUG(lock, "refreshed");
586 #else /* !HAVE_SERVER_SUPPORT || !__KERNEL__ */
588 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
593 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
598 # ifdef HAVE_SERVER_SUPPORT
599 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
601 LASSERT(lock->l_res_locked);
602 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
607 #endif /* HAVE_SERVER_SUPPORT && __KERNEL__ */
609 #ifdef HAVE_SERVER_SUPPORT
611 static void ldlm_failed_ast(struct ldlm_lock *lock, int rc,
612 const char *ast_type)
614 LCONSOLE_ERROR_MSG(0x138, "%s: A client on nid %s was evicted due "
615 "to a lock %s callback time out: rc %d\n",
616 lock->l_export->exp_obd->obd_name,
617 obd_export_nid2str(lock->l_export), ast_type, rc);
619 if (obd_dump_on_timeout)
620 libcfs_debug_dumplog();
622 cfs_spin_lock_bh(&waiting_locks_spinlock);
623 if (__ldlm_del_waiting_lock(lock) == 0)
624 /* the lock was not in any list, grab an extra ref before adding
625 * the lock to the expired list */
627 cfs_list_add(&lock->l_pending_chain,
628 &expired_lock_thread.elt_expired_locks);
629 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
630 cfs_spin_unlock_bh(&waiting_locks_spinlock);
632 class_fail_export(lock->l_export);
636 static int ldlm_handle_ast_error(struct ldlm_lock *lock,
637 struct ptlrpc_request *req, int rc,
638 const char *ast_type)
640 lnet_process_id_t peer = req->rq_import->imp_connection->c_peer;
642 if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) {
643 LASSERT(lock->l_export);
644 if (lock->l_export->exp_libclient) {
645 LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)"
646 " timeout, just cancelling lock", ast_type,
647 libcfs_nid2str(peer.nid));
648 ldlm_lock_cancel(lock);
650 } else if (lock->l_flags & LDLM_FL_CANCEL) {
651 LDLM_DEBUG(lock, "%s AST timeout from nid %s, but "
652 "cancel was received (AST reply lost?)",
653 ast_type, libcfs_nid2str(peer.nid));
654 ldlm_lock_cancel(lock);
657 ldlm_del_waiting_lock(lock);
658 ldlm_failed_ast(lock, rc, ast_type);
662 struct ldlm_resource *res = lock->l_resource;
663 LDLM_DEBUG(lock, "client (nid %s) returned %d"
664 " from %s AST - normal race",
665 libcfs_nid2str(peer.nid),
667 lustre_msg_get_status(req->rq_repmsg) : -1,
670 /* update lvbo to return proper attributes.
672 ldlm_resource_getref(res);
673 ldlm_res_lvbo_update(res, NULL, 1);
674 ldlm_resource_putref(res);
678 LDLM_ERROR(lock, "client (nid %s) returned %d "
679 "from %s AST", libcfs_nid2str(peer.nid),
680 (req->rq_repmsg != NULL) ?
681 lustre_msg_get_status(req->rq_repmsg) : 0,
684 ldlm_lock_cancel(lock);
685 /* Server-side AST functions are called from ldlm_reprocess_all,
686 * which needs to be told to please restart its reprocessing. */
693 static int ldlm_cb_interpret(const struct lu_env *env,
694 struct ptlrpc_request *req, void *data, int rc)
696 struct ldlm_cb_async_args *ca = data;
697 struct ldlm_lock *lock = ca->ca_lock;
698 struct ldlm_cb_set_arg *arg = ca->ca_set_arg;
701 LASSERT(lock != NULL);
704 case LDLM_GL_CALLBACK:
705 /* Update the LVB from disk if the AST failed
706 * (this is a legal race)
708 * - Glimpse callback of local lock just returns
709 * -ELDLM_NO_LOCK_DATA.
710 * - Glimpse callback of remote lock might return
711 * -ELDLM_NO_LOCK_DATA when inode is cleared. LU-274
713 if (rc == -ELDLM_NO_LOCK_DATA) {
714 LDLM_DEBUG(lock, "lost race - client has a lock but no "
716 ldlm_res_lvbo_update(lock->l_resource, NULL, 1);
717 } else if (rc != 0) {
718 rc = ldlm_handle_ast_error(lock, req, rc, "glimpse");
720 rc = ldlm_res_lvbo_update(lock->l_resource, req, 1);
723 case LDLM_BL_CALLBACK:
725 rc = ldlm_handle_ast_error(lock, req, rc, "blocking");
727 case LDLM_CP_CALLBACK:
729 rc = ldlm_handle_ast_error(lock, req, rc, "completion");
732 LDLM_ERROR(lock, "invalid opcode for lock callback %d",
737 /* release extra reference taken in ldlm_ast_fini() */
738 LDLM_LOCK_RELEASE(lock);
741 cfs_atomic_inc(&arg->restart);
746 static inline int ldlm_ast_fini(struct ptlrpc_request *req,
747 struct ldlm_cb_set_arg *arg,
748 struct ldlm_lock *lock,
754 if (unlikely(instant_cancel)) {
755 rc = ptl_send_rpc(req, 1);
756 ptlrpc_req_finished(req);
758 cfs_atomic_inc(&arg->restart);
761 ptlrpc_set_add_req(arg->set, req);
768 * Check if there are requests in the export request list which prevent
769 * the lock canceling and make these requests high priority ones.
771 static void ldlm_lock_reorder_req(struct ldlm_lock *lock)
773 struct ptlrpc_request *req;
776 if (lock->l_export == NULL) {
777 LDLM_DEBUG(lock, "client lock: no-op");
781 cfs_spin_lock_bh(&lock->l_export->exp_rpc_lock);
782 cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
784 /* Do not process requests that were not yet added to there
785 * incoming queue or were already removed from there for
787 if (!req->rq_hp && !cfs_list_empty(&req->rq_list) &&
788 req->rq_ops->hpreq_lock_match &&
789 req->rq_ops->hpreq_lock_match(req, lock))
790 ptlrpc_hpreq_reorder(req);
792 cfs_spin_unlock_bh(&lock->l_export->exp_rpc_lock);
797 * ->l_blocking_ast() method for server-side locks. This is invoked when newly
798 * enqueued server lock conflicts with given one.
800 * Sends blocking ast rpc to the client owning that lock; arms timeout timer
801 * to wait for client response.
803 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
804 struct ldlm_lock_desc *desc,
805 void *data, int flag)
807 struct ldlm_cb_async_args *ca;
808 struct ldlm_cb_set_arg *arg = data;
809 struct ldlm_request *body;
810 struct ptlrpc_request *req;
811 int instant_cancel = 0;
815 if (flag == LDLM_CB_CANCELING)
816 /* Don't need to do anything here. */
820 LASSERT(data != NULL);
821 if (lock->l_export->exp_obd->obd_recovering != 0)
822 LDLM_ERROR(lock, "BUG 6063: lock collide during recovery");
824 ldlm_lock_reorder_req(lock);
826 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
827 &RQF_LDLM_BL_CALLBACK,
828 LUSTRE_DLM_VERSION, LDLM_BL_CALLBACK);
832 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
833 ca = ptlrpc_req_async_args(req);
834 ca->ca_set_arg = arg;
837 req->rq_interpret_reply = ldlm_cb_interpret;
838 req->rq_no_resend = 1;
840 lock_res_and_lock(lock);
841 if (lock->l_granted_mode != lock->l_req_mode) {
842 /* this blocking AST will be communicated as part of the
843 * completion AST instead */
844 unlock_res_and_lock(lock);
846 ptlrpc_req_finished(req);
847 LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
851 if (lock->l_destroyed) {
852 /* What's the point? */
853 unlock_res_and_lock(lock);
854 ptlrpc_req_finished(req);
858 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
861 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
862 body->lock_handle[0] = lock->l_remote_handle;
863 body->lock_desc = *desc;
864 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
866 LDLM_DEBUG(lock, "server preparing blocking AST");
868 ptlrpc_request_set_replen(req);
869 if (instant_cancel) {
870 unlock_res_and_lock(lock);
871 ldlm_lock_cancel(lock);
873 LASSERT(lock->l_granted_mode == lock->l_req_mode);
874 ldlm_add_waiting_lock(lock);
875 unlock_res_and_lock(lock);
878 req->rq_send_state = LUSTRE_IMP_FULL;
879 /* ptlrpc_request_alloc_pack already set timeout */
881 req->rq_timeout = ldlm_get_rq_timeout();
883 if (lock->l_export && lock->l_export->exp_nid_stats &&
884 lock->l_export->exp_nid_stats->nid_ldlm_stats)
885 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
886 LDLM_BL_CALLBACK - LDLM_FIRST_OPC);
888 rc = ldlm_ast_fini(req, arg, lock, instant_cancel);
893 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
895 struct ldlm_cb_set_arg *arg = data;
896 struct ldlm_request *body;
897 struct ptlrpc_request *req;
898 struct ldlm_cb_async_args *ca;
899 long total_enqueue_wait;
900 int instant_cancel = 0;
905 LASSERT(lock != NULL);
906 LASSERT(data != NULL);
908 total_enqueue_wait = cfs_time_sub(cfs_time_current_sec(),
909 lock->l_last_activity);
911 req = ptlrpc_request_alloc(lock->l_export->exp_imp_reverse,
912 &RQF_LDLM_CP_CALLBACK);
916 /* server namespace, doesn't need lock */
917 lvb_len = ldlm_lvbo_size(lock);
919 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT,
922 rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_CP_CALLBACK);
924 ptlrpc_request_free(req);
928 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
929 ca = ptlrpc_req_async_args(req);
930 ca->ca_set_arg = arg;
933 req->rq_interpret_reply = ldlm_cb_interpret;
934 req->rq_no_resend = 1;
935 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
937 body->lock_handle[0] = lock->l_remote_handle;
938 body->lock_flags = flags;
939 ldlm_lock2desc(lock, &body->lock_desc);
941 void *lvb = req_capsule_client_get(&req->rq_pill, &RMF_DLM_LVB);
943 lvb_len = ldlm_lvbo_fill(lock, lvb, lvb_len);
944 req_capsule_shrink(&req->rq_pill, &RMF_DLM_LVB,
945 lvb_len, RCL_CLIENT);
948 LDLM_DEBUG(lock, "server preparing completion AST (after %lds wait)",
951 /* Server-side enqueue wait time estimate, used in
952 __ldlm_add_waiting_lock to set future enqueue timers */
953 if (total_enqueue_wait < ldlm_get_enq_timeout(lock))
954 at_measured(ldlm_lock_to_ns_at(lock),
957 /* bz18618. Don't add lock enqueue time we spend waiting for a
958 previous callback to fail. Locks waiting legitimately will
959 get extended by ldlm_refresh_waiting_lock regardless of the
960 estimate, so it's okay to underestimate here. */
961 LDLM_DEBUG(lock, "lock completed after %lus; estimate was %ds. "
962 "It is likely that a previous callback timed out.",
964 at_get(ldlm_lock_to_ns_at(lock)));
966 ptlrpc_request_set_replen(req);
968 req->rq_send_state = LUSTRE_IMP_FULL;
969 /* ptlrpc_request_pack already set timeout */
971 req->rq_timeout = ldlm_get_rq_timeout();
973 /* We only send real blocking ASTs after the lock is granted */
974 lock_res_and_lock(lock);
975 if (lock->l_flags & LDLM_FL_AST_SENT) {
976 body->lock_flags |= LDLM_FL_AST_SENT;
977 /* copy ast flags like LDLM_FL_DISCARD_DATA */
978 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
980 /* We might get here prior to ldlm_handle_enqueue setting
981 * LDLM_FL_CANCEL_ON_BLOCK flag. Then we will put this lock
982 * into waiting list, but this is safe and similar code in
983 * ldlm_handle_enqueue will call ldlm_lock_cancel() still,
984 * that would not only cancel the lock, but will also remove
985 * it from waiting list */
986 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) {
987 unlock_res_and_lock(lock);
988 ldlm_lock_cancel(lock);
990 lock_res_and_lock(lock);
992 /* start the lock-timeout clock */
993 ldlm_add_waiting_lock(lock);
996 unlock_res_and_lock(lock);
998 if (lock->l_export && lock->l_export->exp_nid_stats &&
999 lock->l_export->exp_nid_stats->nid_ldlm_stats)
1000 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
1001 LDLM_CP_CALLBACK - LDLM_FIRST_OPC);
1003 rc = ldlm_ast_fini(req, arg, lock, instant_cancel);
1008 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data)
1010 struct ldlm_cb_set_arg *arg = data;
1011 struct ldlm_request *body;
1012 struct ptlrpc_request *req;
1013 struct ldlm_cb_async_args *ca;
1017 LASSERT(lock != NULL);
1019 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
1020 &RQF_LDLM_GL_CALLBACK,
1021 LUSTRE_DLM_VERSION, LDLM_GL_CALLBACK);
1026 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1027 body->lock_handle[0] = lock->l_remote_handle;
1028 ldlm_lock2desc(lock, &body->lock_desc);
1030 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
1031 ca = ptlrpc_req_async_args(req);
1032 ca->ca_set_arg = arg;
1035 /* server namespace, doesn't need lock */
1036 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
1037 ldlm_lvbo_size(lock));
1038 ptlrpc_request_set_replen(req);
1040 req->rq_send_state = LUSTRE_IMP_FULL;
1041 /* ptlrpc_request_alloc_pack already set timeout */
1043 req->rq_timeout = ldlm_get_rq_timeout();
1045 req->rq_interpret_reply = ldlm_cb_interpret;
1047 if (lock->l_export && lock->l_export->exp_nid_stats &&
1048 lock->l_export->exp_nid_stats->nid_ldlm_stats)
1049 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
1050 LDLM_GL_CALLBACK - LDLM_FIRST_OPC);
1052 rc = ldlm_ast_fini(req, arg, lock, 0);
1057 int ldlm_glimpse_locks(struct ldlm_resource *res, cfs_list_t *gl_work_list)
1062 rc = ldlm_run_ast_work(ldlm_res_to_ns(res), gl_work_list,
1064 if (rc == -ERESTART)
1065 ldlm_reprocess_all(res);
1070 static void ldlm_svc_get_eopc(const struct ldlm_request *dlm_req,
1071 struct lprocfs_stats *srv_stats)
1073 int lock_type = 0, op = 0;
1075 lock_type = dlm_req->lock_desc.l_resource.lr_type;
1077 switch (lock_type) {
1079 op = PTLRPC_LAST_CNTR + LDLM_PLAIN_ENQUEUE;
1082 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT)
1083 op = PTLRPC_LAST_CNTR + LDLM_GLIMPSE_ENQUEUE;
1085 op = PTLRPC_LAST_CNTR + LDLM_EXTENT_ENQUEUE;
1088 op = PTLRPC_LAST_CNTR + LDLM_FLOCK_ENQUEUE;
1091 op = PTLRPC_LAST_CNTR + LDLM_IBITS_ENQUEUE;
1099 lprocfs_counter_incr(srv_stats, op);
1105 * Main server-side entry point into LDLM. This is called by ptlrpc service
1106 * threads to carry out client lock enqueueing requests.
1108 int ldlm_handle_enqueue0(struct ldlm_namespace *ns,
1109 struct ptlrpc_request *req,
1110 const struct ldlm_request *dlm_req,
1111 const struct ldlm_callback_suite *cbs)
1113 struct ldlm_reply *dlm_rep;
1115 ldlm_error_t err = ELDLM_OK;
1116 struct ldlm_lock *lock = NULL;
1117 void *cookie = NULL;
1121 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
1123 ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF);
1124 flags = dlm_req->lock_flags;
1126 LASSERT(req->rq_export);
1128 if (ptlrpc_req2svc(req)->srv_stats != NULL)
1129 ldlm_svc_get_eopc(dlm_req, ptlrpc_req2svc(req)->srv_stats);
1131 if (req->rq_export && req->rq_export->exp_nid_stats &&
1132 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1133 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1134 LDLM_ENQUEUE - LDLM_FIRST_OPC);
1136 if (unlikely(dlm_req->lock_desc.l_resource.lr_type < LDLM_MIN_TYPE ||
1137 dlm_req->lock_desc.l_resource.lr_type >= LDLM_MAX_TYPE)) {
1138 DEBUG_REQ(D_ERROR, req, "invalid lock request type %d",
1139 dlm_req->lock_desc.l_resource.lr_type);
1140 GOTO(out, rc = -EFAULT);
1143 if (unlikely(dlm_req->lock_desc.l_req_mode <= LCK_MINMODE ||
1144 dlm_req->lock_desc.l_req_mode >= LCK_MAXMODE ||
1145 dlm_req->lock_desc.l_req_mode &
1146 (dlm_req->lock_desc.l_req_mode-1))) {
1147 DEBUG_REQ(D_ERROR, req, "invalid lock request mode %d",
1148 dlm_req->lock_desc.l_req_mode);
1149 GOTO(out, rc = -EFAULT);
1152 if (req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) {
1153 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1155 DEBUG_REQ(D_ERROR, req,
1156 "PLAIN lock request from IBITS client?");
1157 GOTO(out, rc = -EPROTO);
1159 } else if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1161 DEBUG_REQ(D_ERROR, req,
1162 "IBITS lock request from unaware client?");
1163 GOTO(out, rc = -EPROTO);
1167 /* FIXME this makes it impossible to use LDLM_PLAIN locks -- check
1168 against server's _CONNECT_SUPPORTED flags? (I don't want to use
1169 ibits for mgc/mgs) */
1171 /* INODEBITS_INTEROP: Perform conversion from plain lock to
1172 * inodebits lock if client does not support them. */
1173 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) &&
1174 (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN)) {
1175 dlm_req->lock_desc.l_resource.lr_type = LDLM_IBITS;
1176 dlm_req->lock_desc.l_policy_data.l_inodebits.bits =
1177 MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
1178 if (dlm_req->lock_desc.l_req_mode == LCK_PR)
1179 dlm_req->lock_desc.l_req_mode = LCK_CR;
1183 if (unlikely(flags & LDLM_FL_REPLAY)) {
1184 /* Find an existing lock in the per-export lock hash */
1185 /* In the function below, .hs_keycmp resolves to
1186 * ldlm_export_lock_keycmp() */
1187 /* coverity[overrun-buffer-val] */
1188 lock = cfs_hash_lookup(req->rq_export->exp_lock_hash,
1189 (void *)&dlm_req->lock_handle[0]);
1191 DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie "
1192 LPX64, lock->l_handle.h_cookie);
1193 GOTO(existing_lock, rc = 0);
1197 /* The lock's callback data might be set in the policy function */
1198 lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name,
1199 dlm_req->lock_desc.l_resource.lr_type,
1200 dlm_req->lock_desc.l_req_mode,
1204 GOTO(out, rc = -ENOMEM);
1206 lock->l_last_activity = cfs_time_current_sec();
1207 lock->l_remote_handle = dlm_req->lock_handle[0];
1208 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
1210 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2);
1211 /* Don't enqueue a lock onto the export if it is been disonnected
1212 * due to eviction (bug 3822) or server umount (bug 24324).
1213 * Cancel it now instead. */
1214 if (req->rq_export->exp_disconnected) {
1215 LDLM_ERROR(lock, "lock on disconnected export %p",
1217 GOTO(out, rc = -ENOTCONN);
1220 lock->l_export = class_export_lock_get(req->rq_export, lock);
1221 if (lock->l_export->exp_lock_hash)
1222 cfs_hash_add(lock->l_export->exp_lock_hash,
1223 &lock->l_remote_handle,
1228 if (flags & LDLM_FL_HAS_INTENT) {
1229 /* In this case, the reply buffer is allocated deep in
1230 * local_lock_enqueue by the policy function. */
1233 /* based on the assumption that lvb size never changes during
1234 * resource life time otherwise it need resource->lr_lock's
1236 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB,
1237 RCL_SERVER, ldlm_lvbo_size(lock));
1239 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR))
1240 GOTO(out, rc = -ENOMEM);
1242 rc = req_capsule_server_pack(&req->rq_pill);
1247 if (dlm_req->lock_desc.l_resource.lr_type != LDLM_PLAIN)
1248 ldlm_convert_policy_to_local(req->rq_export,
1249 dlm_req->lock_desc.l_resource.lr_type,
1250 &dlm_req->lock_desc.l_policy_data,
1251 &lock->l_policy_data);
1252 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
1253 lock->l_req_extent = lock->l_policy_data.l_extent;
1255 err = ldlm_lock_enqueue(ns, &lock, cookie, (int *)&flags);
1259 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1260 dlm_rep->lock_flags = flags;
1262 ldlm_lock2desc(lock, &dlm_rep->lock_desc);
1263 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
1265 /* We never send a blocking AST until the lock is granted, but
1266 * we can tell it right now */
1267 lock_res_and_lock(lock);
1269 /* Now take into account flags to be inherited from original lock
1270 request both in reply to client and in our own lock flags. */
1271 dlm_rep->lock_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1272 lock->l_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1274 /* Don't move a pending lock onto the export if it has already been
1275 * disconnected due to eviction (bug 5683) or server umount (bug 24324).
1276 * Cancel it now instead. */
1277 if (unlikely(req->rq_export->exp_disconnected ||
1278 OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT))) {
1279 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1281 } else if (lock->l_flags & LDLM_FL_AST_SENT) {
1282 dlm_rep->lock_flags |= LDLM_FL_AST_SENT;
1283 if (lock->l_granted_mode == lock->l_req_mode) {
1285 * Only cancel lock if it was granted, because it would
1286 * be destroyed immediately and would never be granted
1287 * in the future, causing timeouts on client. Not
1288 * granted lock will be cancelled immediately after
1289 * sending completion AST.
1291 if (dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK) {
1292 unlock_res_and_lock(lock);
1293 ldlm_lock_cancel(lock);
1294 lock_res_and_lock(lock);
1296 ldlm_add_waiting_lock(lock);
1299 /* Make sure we never ever grant usual metadata locks to liblustre
1301 if ((dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN ||
1302 dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS) &&
1303 req->rq_export->exp_libclient) {
1304 if (unlikely(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) ||
1305 !(dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK))){
1306 CERROR("Granting sync lock to libclient. "
1307 "req fl %d, rep fl %d, lock fl "LPX64"\n",
1308 dlm_req->lock_flags, dlm_rep->lock_flags,
1310 LDLM_ERROR(lock, "sync lock");
1311 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT) {
1312 struct ldlm_intent *it;
1314 it = req_capsule_client_get(&req->rq_pill,
1317 CERROR("This is intent %s ("LPU64")\n",
1318 ldlm_it2str(it->opc), it->opc);
1324 unlock_res_and_lock(lock);
1328 req->rq_status = rc ?: err; /* return either error - bug 11190 */
1329 if (!req->rq_packed_final) {
1330 err = lustre_pack_reply(req, 1, NULL, NULL);
1335 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
1336 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
1338 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
1339 "(err=%d, rc=%d)", err, rc);
1342 int lvb_len = ldlm_lvbo_size(lock);
1348 buf = req_capsule_server_get(&req->rq_pill,
1350 LASSERTF(buf != NULL, "req %p, lock %p\n",
1352 buflen = req_capsule_get_size(&req->rq_pill,
1353 &RMF_DLM_LVB, RCL_SERVER);
1354 buflen = ldlm_lvbo_fill(lock, buf, buflen);
1355 req_capsule_shrink(&req->rq_pill, &RMF_DLM_LVB,
1356 buflen, RCL_SERVER);
1359 lock_res_and_lock(lock);
1360 ldlm_resource_unlink_lock(lock);
1361 ldlm_lock_destroy_nolock(lock);
1362 unlock_res_and_lock(lock);
1365 if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK)
1366 ldlm_reprocess_all(lock->l_resource);
1368 LDLM_LOCK_RELEASE(lock);
1371 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p, rc %d)",
1377 int ldlm_handle_enqueue(struct ptlrpc_request *req,
1378 ldlm_completion_callback completion_callback,
1379 ldlm_blocking_callback blocking_callback,
1380 ldlm_glimpse_callback glimpse_callback)
1382 struct ldlm_request *dlm_req;
1383 struct ldlm_callback_suite cbs = {
1384 .lcs_completion = completion_callback,
1385 .lcs_blocking = blocking_callback,
1386 .lcs_glimpse = glimpse_callback
1390 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1391 if (dlm_req != NULL) {
1392 rc = ldlm_handle_enqueue0(req->rq_export->exp_obd->obd_namespace,
1393 req, dlm_req, &cbs);
1400 int ldlm_handle_convert0(struct ptlrpc_request *req,
1401 const struct ldlm_request *dlm_req)
1403 struct ldlm_reply *dlm_rep;
1404 struct ldlm_lock *lock;
1408 if (req->rq_export && req->rq_export->exp_nid_stats &&
1409 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1410 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1411 LDLM_CONVERT - LDLM_FIRST_OPC);
1413 rc = req_capsule_server_pack(&req->rq_pill);
1417 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1418 dlm_rep->lock_flags = dlm_req->lock_flags;
1420 lock = ldlm_handle2lock(&dlm_req->lock_handle[0]);
1422 req->rq_status = EINVAL;
1426 LDLM_DEBUG(lock, "server-side convert handler START");
1428 lock->l_last_activity = cfs_time_current_sec();
1429 res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
1430 &dlm_rep->lock_flags);
1432 if (ldlm_del_waiting_lock(lock))
1433 LDLM_DEBUG(lock, "converted waiting lock");
1436 req->rq_status = EDEADLOCK;
1441 if (!req->rq_status)
1442 ldlm_reprocess_all(lock->l_resource);
1443 LDLM_DEBUG(lock, "server-side convert handler END");
1444 LDLM_LOCK_PUT(lock);
1446 LDLM_DEBUG_NOLOCK("server-side convert handler END");
1451 int ldlm_handle_convert(struct ptlrpc_request *req)
1454 struct ldlm_request *dlm_req;
1456 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1457 if (dlm_req != NULL) {
1458 rc = ldlm_handle_convert0(req, dlm_req);
1460 CERROR ("Can't unpack dlm_req\n");
1466 /* Cancel all the locks whos handles are packed into ldlm_request */
1467 int ldlm_request_cancel(struct ptlrpc_request *req,
1468 const struct ldlm_request *dlm_req, int first)
1470 struct ldlm_resource *res, *pres = NULL;
1471 struct ldlm_lock *lock;
1472 int i, count, done = 0;
1475 count = dlm_req->lock_count ? dlm_req->lock_count : 1;
1479 /* There is no lock on the server at the replay time,
1480 * skip lock cancelling to make replay tests to pass. */
1481 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1484 LDLM_DEBUG_NOLOCK("server-side cancel handler START: %d locks, "
1485 "starting at %d", count, first);
1487 for (i = first; i < count; i++) {
1488 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
1490 LDLM_DEBUG_NOLOCK("server-side cancel handler stale "
1491 "lock (cookie "LPU64")",
1492 dlm_req->lock_handle[i].cookie);
1496 res = lock->l_resource;
1501 ldlm_reprocess_all(pres);
1502 LDLM_RESOURCE_DELREF(pres);
1503 ldlm_resource_putref(pres);
1506 ldlm_resource_getref(res);
1507 LDLM_RESOURCE_ADDREF(res);
1508 ldlm_res_lvbo_update(res, NULL, 1);
1512 ldlm_lock_cancel(lock);
1513 LDLM_LOCK_PUT(lock);
1516 ldlm_reprocess_all(pres);
1517 LDLM_RESOURCE_DELREF(pres);
1518 ldlm_resource_putref(pres);
1520 LDLM_DEBUG_NOLOCK("server-side cancel handler END");
1524 int ldlm_handle_cancel(struct ptlrpc_request *req)
1526 struct ldlm_request *dlm_req;
1530 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1531 if (dlm_req == NULL) {
1532 CDEBUG(D_INFO, "bad request buffer for cancel\n");
1536 if (req->rq_export && req->rq_export->exp_nid_stats &&
1537 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1538 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1539 LDLM_CANCEL - LDLM_FIRST_OPC);
1541 rc = req_capsule_server_pack(&req->rq_pill);
1545 if (!ldlm_request_cancel(req, dlm_req, 0))
1546 req->rq_status = ESTALE;
1548 RETURN(ptlrpc_reply(req));
1550 #endif /* HAVE_SERVER_SUPPORT */
1552 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
1553 struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
1558 LDLM_DEBUG(lock, "client blocking AST callback handler");
1560 lock_res_and_lock(lock);
1561 lock->l_flags |= LDLM_FL_CBPENDING;
1563 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
1564 lock->l_flags |= LDLM_FL_CANCEL;
1566 do_ast = (!lock->l_readers && !lock->l_writers);
1567 unlock_res_and_lock(lock);
1570 CDEBUG(D_DLMTRACE, "Lock %p already unused, calling callback (%p)\n",
1571 lock, lock->l_blocking_ast);
1572 if (lock->l_blocking_ast != NULL)
1573 lock->l_blocking_ast(lock, ld, lock->l_ast_data,
1576 CDEBUG(D_DLMTRACE, "Lock %p is referenced, will be cancelled later\n",
1580 LDLM_DEBUG(lock, "client blocking callback handler END");
1581 LDLM_LOCK_RELEASE(lock);
1585 static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
1586 struct ldlm_namespace *ns,
1587 struct ldlm_request *dlm_req,
1588 struct ldlm_lock *lock)
1591 CFS_LIST_HEAD(ast_list);
1594 LDLM_DEBUG(lock, "client completion callback handler START");
1596 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
1597 int to = cfs_time_seconds(1);
1599 cfs_schedule_timeout_and_set_state(
1600 CFS_TASK_INTERRUPTIBLE, to);
1601 if (lock->l_granted_mode == lock->l_req_mode ||
1607 lvb_len = req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT);
1609 if (lock->l_lvb_len > 0) {
1610 /* for extent lock, lvb contains ost_lvb{}. */
1611 LASSERT(lock->l_lvb_data != NULL);
1612 LASSERTF(lock->l_lvb_len == lvb_len,
1613 "preallocated %d, actual %d.\n",
1614 lock->l_lvb_len, lvb_len);
1615 } else { /* for layout lock, lvb has variable length */
1618 OBD_ALLOC(lvb_data, lvb_len);
1619 if (lvb_data == NULL)
1620 LDLM_ERROR(lock, "no memory.\n");
1622 lock_res_and_lock(lock);
1623 if (lvb_data == NULL) {
1624 lock->l_flags |= LDLM_FL_FAILED;
1626 LASSERT(lock->l_lvb_data == NULL);
1627 lock->l_lvb_data = lvb_data;
1628 lock->l_lvb_len = lvb_len;
1630 unlock_res_and_lock(lock);
1634 lock_res_and_lock(lock);
1635 if (lock->l_destroyed ||
1636 lock->l_granted_mode == lock->l_req_mode) {
1637 /* bug 11300: the lock has already been granted */
1638 unlock_res_and_lock(lock);
1639 LDLM_DEBUG(lock, "Double grant race happened");
1640 LDLM_LOCK_RELEASE(lock);
1645 /* If we receive the completion AST before the actual enqueue returned,
1646 * then we might need to switch lock modes, resources, or extents. */
1647 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
1648 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
1649 LDLM_DEBUG(lock, "completion AST, new lock mode");
1652 if (lock->l_resource->lr_type != LDLM_PLAIN) {
1653 ldlm_convert_policy_to_local(req->rq_export,
1654 dlm_req->lock_desc.l_resource.lr_type,
1655 &dlm_req->lock_desc.l_policy_data,
1656 &lock->l_policy_data);
1657 LDLM_DEBUG(lock, "completion AST, new policy data");
1660 ldlm_resource_unlink_lock(lock);
1661 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
1662 &lock->l_resource->lr_name,
1663 sizeof(lock->l_resource->lr_name)) != 0) {
1664 unlock_res_and_lock(lock);
1665 if (ldlm_lock_change_resource(ns, lock,
1666 &dlm_req->lock_desc.l_resource.lr_name) != 0) {
1667 LDLM_ERROR(lock, "Failed to allocate resource");
1668 LDLM_LOCK_RELEASE(lock);
1672 LDLM_DEBUG(lock, "completion AST, new resource");
1673 CERROR("change resource!\n");
1674 lock_res_and_lock(lock);
1677 if (dlm_req->lock_flags & LDLM_FL_AST_SENT) {
1678 /* BL_AST locks are not needed in lru.
1679 * let ldlm_cancel_lru() be fast. */
1680 ldlm_lock_remove_from_lru(lock);
1681 lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
1682 LDLM_DEBUG(lock, "completion AST includes blocking AST");
1685 if (lock->l_lvb_len) {
1686 if (req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB,
1687 RCL_CLIENT) < lock->l_lvb_len) {
1688 LDLM_ERROR(lock, "completion AST did not contain "
1691 void *lvb = req_capsule_client_get(&req->rq_pill,
1693 memcpy(lock->l_lvb_data, lvb, lock->l_lvb_len);
1697 ldlm_grant_lock(lock, &ast_list);
1698 unlock_res_and_lock(lock);
1700 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
1702 /* Let Enqueue to call osc_lock_upcall() and initialize
1704 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 2);
1706 ldlm_run_ast_work(ns, &ast_list, LDLM_WORK_CP_AST);
1708 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
1710 LDLM_LOCK_RELEASE(lock);
1714 static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
1715 struct ldlm_namespace *ns,
1716 struct ldlm_request *dlm_req,
1717 struct ldlm_lock *lock)
1722 LDLM_DEBUG(lock, "client glimpse AST callback handler");
1724 if (lock->l_glimpse_ast != NULL)
1725 rc = lock->l_glimpse_ast(lock, req);
1727 if (req->rq_repmsg != NULL) {
1730 req->rq_status = rc;
1734 lock_res_and_lock(lock);
1735 if (lock->l_granted_mode == LCK_PW &&
1736 !lock->l_readers && !lock->l_writers &&
1737 cfs_time_after(cfs_time_current(),
1738 cfs_time_add(lock->l_last_used,
1739 cfs_time_seconds(10)))) {
1740 unlock_res_and_lock(lock);
1741 if (ldlm_bl_to_thread_lock(ns, NULL, lock))
1742 ldlm_handle_bl_callback(ns, NULL, lock);
1747 unlock_res_and_lock(lock);
1748 LDLM_LOCK_RELEASE(lock);
1752 static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
1754 if (req->rq_no_reply)
1757 req->rq_status = rc;
1758 if (!req->rq_packed_final) {
1759 rc = lustre_pack_reply(req, 1, NULL, NULL);
1763 return ptlrpc_reply(req);
1767 static int __ldlm_bl_to_thread(struct ldlm_bl_work_item *blwi, int mode)
1769 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
1772 cfs_spin_lock(&blp->blp_lock);
1773 if (blwi->blwi_lock && blwi->blwi_lock->l_flags & LDLM_FL_DISCARD_DATA) {
1774 /* add LDLM_FL_DISCARD_DATA requests to the priority list */
1775 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list);
1777 /* other blocking callbacks are added to the regular list */
1778 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_list);
1780 cfs_spin_unlock(&blp->blp_lock);
1782 cfs_waitq_signal(&blp->blp_waitq);
1784 /* can not use blwi->blwi_mode as blwi could be already freed in
1786 if (mode == LDLM_SYNC)
1787 cfs_wait_for_completion(&blwi->blwi_comp);
1792 static inline void init_blwi(struct ldlm_bl_work_item *blwi,
1793 struct ldlm_namespace *ns,
1794 struct ldlm_lock_desc *ld,
1795 cfs_list_t *cancels, int count,
1796 struct ldlm_lock *lock,
1799 cfs_init_completion(&blwi->blwi_comp);
1800 CFS_INIT_LIST_HEAD(&blwi->blwi_head);
1802 if (cfs_memory_pressure_get())
1803 blwi->blwi_mem_pressure = 1;
1806 blwi->blwi_mode = mode;
1808 blwi->blwi_ld = *ld;
1810 cfs_list_add(&blwi->blwi_head, cancels);
1811 cfs_list_del_init(cancels);
1812 blwi->blwi_count = count;
1814 blwi->blwi_lock = lock;
1818 static int ldlm_bl_to_thread(struct ldlm_namespace *ns,
1819 struct ldlm_lock_desc *ld, struct ldlm_lock *lock,
1820 cfs_list_t *cancels, int count, int mode)
1824 if (cancels && count == 0)
1827 if (mode == LDLM_SYNC) {
1828 /* if it is synchronous call do minimum mem alloc, as it could
1829 * be triggered from kernel shrinker
1831 struct ldlm_bl_work_item blwi;
1832 memset(&blwi, 0, sizeof(blwi));
1833 init_blwi(&blwi, ns, ld, cancels, count, lock, LDLM_SYNC);
1834 RETURN(__ldlm_bl_to_thread(&blwi, LDLM_SYNC));
1836 struct ldlm_bl_work_item *blwi;
1837 OBD_ALLOC(blwi, sizeof(*blwi));
1840 init_blwi(blwi, ns, ld, cancels, count, lock, LDLM_ASYNC);
1842 RETURN(__ldlm_bl_to_thread(blwi, LDLM_ASYNC));
1848 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1849 struct ldlm_lock *lock)
1852 RETURN(ldlm_bl_to_thread(ns, ld, lock, NULL, 0, LDLM_ASYNC));
1858 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1859 cfs_list_t *cancels, int count, int mode)
1862 RETURN(ldlm_bl_to_thread(ns, ld, NULL, cancels, count, mode));
1868 /* Setinfo coming from Server (eg MDT) to Client (eg MDC)! */
1869 static int ldlm_handle_setinfo(struct ptlrpc_request *req)
1871 struct obd_device *obd = req->rq_export->exp_obd;
1878 DEBUG_REQ(D_HSM, req, "%s: handle setinfo\n", obd->obd_name);
1880 req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
1882 key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1884 DEBUG_REQ(D_IOCTL, req, "no set_info key");
1887 keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
1889 val = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1891 DEBUG_REQ(D_IOCTL, req, "no set_info val");
1894 vallen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_VAL,
1897 /* We are responsible for swabbing contents of val */
1899 if (KEY_IS(KEY_HSM_COPYTOOL_SEND))
1900 /* Pass it on to mdc (the "export" in this case) */
1901 rc = obd_set_info_async(req->rq_svc_thread->t_env,
1903 sizeof(KEY_HSM_COPYTOOL_SEND),
1904 KEY_HSM_COPYTOOL_SEND,
1907 DEBUG_REQ(D_WARNING, req, "ignoring unknown key %s", key);
1912 static inline void ldlm_callback_errmsg(struct ptlrpc_request *req,
1913 const char *msg, int rc,
1914 struct lustre_handle *handle)
1916 DEBUG_REQ((req->rq_no_reply || rc) ? D_WARNING : D_DLMTRACE, req,
1917 "%s: [nid %s] [rc %d] [lock "LPX64"]",
1918 msg, libcfs_id2str(req->rq_peer), rc,
1919 handle ? handle->cookie : 0);
1920 if (req->rq_no_reply)
1921 CWARN("No reply was sent, maybe cause bug 21636.\n");
1923 CWARN("Send reply failed, maybe cause bug 21636.\n");
1926 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
1927 static int ldlm_callback_handler(struct ptlrpc_request *req)
1929 struct ldlm_namespace *ns;
1930 struct ldlm_request *dlm_req;
1931 struct ldlm_lock *lock;
1935 /* Requests arrive in sender's byte order. The ptlrpc service
1936 * handler has already checked and, if necessary, byte-swapped the
1937 * incoming request message body, but I am responsible for the
1938 * message buffers. */
1940 /* do nothing for sec context finalize */
1941 if (lustre_msg_get_opc(req->rq_reqmsg) == SEC_CTX_FINI)
1944 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1946 if (req->rq_export == NULL) {
1947 rc = ldlm_callback_reply(req, -ENOTCONN);
1948 ldlm_callback_errmsg(req, "Operate on unconnected server",
1953 LASSERT(req->rq_export != NULL);
1954 LASSERT(req->rq_export->exp_obd != NULL);
1956 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1957 case LDLM_BL_CALLBACK:
1958 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK))
1961 case LDLM_CP_CALLBACK:
1962 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK))
1965 case LDLM_GL_CALLBACK:
1966 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_GL_CALLBACK))
1970 rc = ldlm_handle_setinfo(req);
1971 ldlm_callback_reply(req, rc);
1973 case OBD_LOG_CANCEL: /* remove this eventually - for 1.4.0 compat */
1974 CERROR("shouldn't be handling OBD_LOG_CANCEL on DLM thread\n");
1975 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
1976 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
1978 rc = llog_origin_handle_cancel(req);
1979 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
1981 ldlm_callback_reply(req, rc);
1983 case LLOG_ORIGIN_HANDLE_CREATE:
1984 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
1985 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1987 rc = llog_origin_handle_open(req);
1988 ldlm_callback_reply(req, rc);
1990 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1991 req_capsule_set(&req->rq_pill,
1992 &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1993 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1995 rc = llog_origin_handle_next_block(req);
1996 ldlm_callback_reply(req, rc);
1998 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1999 req_capsule_set(&req->rq_pill,
2000 &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
2001 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
2003 rc = llog_origin_handle_read_header(req);
2004 ldlm_callback_reply(req, rc);
2006 case LLOG_ORIGIN_HANDLE_CLOSE:
2007 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
2009 rc = llog_origin_handle_close(req);
2010 ldlm_callback_reply(req, rc);
2013 CERROR("unknown opcode %u\n",
2014 lustre_msg_get_opc(req->rq_reqmsg));
2015 ldlm_callback_reply(req, -EPROTO);
2019 ns = req->rq_export->exp_obd->obd_namespace;
2020 LASSERT(ns != NULL);
2022 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2024 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2025 if (dlm_req == NULL) {
2026 rc = ldlm_callback_reply(req, -EPROTO);
2027 ldlm_callback_errmsg(req, "Operate without parameter", rc,
2032 /* Force a known safe race, send a cancel to the server for a lock
2033 * which the server has already started a blocking callback on. */
2034 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE) &&
2035 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
2036 rc = ldlm_cli_cancel(&dlm_req->lock_handle[0]);
2038 CERROR("ldlm_cli_cancel: %d\n", rc);
2041 lock = ldlm_handle2lock_long(&dlm_req->lock_handle[0], 0);
2043 CDEBUG(D_DLMTRACE, "callback on lock "LPX64" - lock "
2044 "disappeared\n", dlm_req->lock_handle[0].cookie);
2045 rc = ldlm_callback_reply(req, -EINVAL);
2046 ldlm_callback_errmsg(req, "Operate with invalid parameter", rc,
2047 &dlm_req->lock_handle[0]);
2051 if ((lock->l_flags & LDLM_FL_FAIL_LOC) &&
2052 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK)
2053 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
2055 /* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */
2056 lock_res_and_lock(lock);
2057 lock->l_flags |= (dlm_req->lock_flags & LDLM_AST_FLAGS);
2058 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
2059 /* If somebody cancels lock and cache is already dropped,
2060 * or lock is failed before cp_ast received on client,
2061 * we can tell the server we have no lock. Otherwise, we
2062 * should send cancel after dropping the cache. */
2063 if (((lock->l_flags & LDLM_FL_CANCELING) &&
2064 (lock->l_flags & LDLM_FL_BL_DONE)) ||
2065 (lock->l_flags & LDLM_FL_FAILED)) {
2066 LDLM_DEBUG(lock, "callback on lock "
2067 LPX64" - lock disappeared\n",
2068 dlm_req->lock_handle[0].cookie);
2069 unlock_res_and_lock(lock);
2070 LDLM_LOCK_RELEASE(lock);
2071 rc = ldlm_callback_reply(req, -EINVAL);
2072 ldlm_callback_errmsg(req, "Operate on stale lock", rc,
2073 &dlm_req->lock_handle[0]);
2076 /* BL_AST locks are not needed in lru.
2077 * let ldlm_cancel_lru() be fast. */
2078 ldlm_lock_remove_from_lru(lock);
2079 lock->l_flags |= LDLM_FL_BL_AST;
2081 unlock_res_and_lock(lock);
2083 /* We want the ost thread to get this reply so that it can respond
2084 * to ost requests (write cache writeback) that might be triggered
2087 * But we'd also like to be able to indicate in the reply that we're
2088 * cancelling right now, because it's unused, or have an intent result
2089 * in the reply, so we might have to push the responsibility for sending
2090 * the reply down into the AST handlers, alas. */
2092 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2093 case LDLM_BL_CALLBACK:
2094 CDEBUG(D_INODE, "blocking ast\n");
2095 req_capsule_extend(&req->rq_pill, &RQF_LDLM_BL_CALLBACK);
2096 if (!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)) {
2097 rc = ldlm_callback_reply(req, 0);
2098 if (req->rq_no_reply || rc)
2099 ldlm_callback_errmsg(req, "Normal process", rc,
2100 &dlm_req->lock_handle[0]);
2102 if (ldlm_bl_to_thread_lock(ns, &dlm_req->lock_desc, lock))
2103 ldlm_handle_bl_callback(ns, &dlm_req->lock_desc, lock);
2105 case LDLM_CP_CALLBACK:
2106 CDEBUG(D_INODE, "completion ast\n");
2107 req_capsule_extend(&req->rq_pill, &RQF_LDLM_CP_CALLBACK);
2108 ldlm_callback_reply(req, 0);
2109 ldlm_handle_cp_callback(req, ns, dlm_req, lock);
2111 case LDLM_GL_CALLBACK:
2112 CDEBUG(D_INODE, "glimpse ast\n");
2113 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
2114 ldlm_handle_gl_callback(req, ns, dlm_req, lock);
2117 LBUG(); /* checked above */
2123 #ifdef HAVE_SERVER_SUPPORT
2124 static int ldlm_cancel_handler(struct ptlrpc_request *req)
2129 /* Requests arrive in sender's byte order. The ptlrpc service
2130 * handler has already checked and, if necessary, byte-swapped the
2131 * incoming request message body, but I am responsible for the
2132 * message buffers. */
2134 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2136 if (req->rq_export == NULL) {
2137 struct ldlm_request *dlm_req;
2139 CERROR("%s from %s arrived at %lu with bad export cookie "
2141 ll_opcode2str(lustre_msg_get_opc(req->rq_reqmsg)),
2142 libcfs_nid2str(req->rq_peer.nid),
2143 req->rq_arrival_time.tv_sec,
2144 lustre_msg_get_handle(req->rq_reqmsg)->cookie);
2146 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_CANCEL) {
2147 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2148 dlm_req = req_capsule_client_get(&req->rq_pill,
2150 if (dlm_req != NULL)
2151 ldlm_lock_dump_handle(D_ERROR,
2152 &dlm_req->lock_handle[0]);
2154 ldlm_callback_reply(req, -ENOTCONN);
2158 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2160 /* XXX FIXME move this back to mds/handler.c, bug 249 */
2162 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2163 CDEBUG(D_INODE, "cancel\n");
2164 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL))
2166 rc = ldlm_handle_cancel(req);
2170 case OBD_LOG_CANCEL:
2171 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2172 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2174 rc = llog_origin_handle_cancel(req);
2175 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2177 ldlm_callback_reply(req, rc);
2180 CERROR("invalid opcode %d\n",
2181 lustre_msg_get_opc(req->rq_reqmsg));
2182 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2183 ldlm_callback_reply(req, -EINVAL);
2189 static int ldlm_cancel_hpreq_lock_match(struct ptlrpc_request *req,
2190 struct ldlm_lock *lock)
2192 struct ldlm_request *dlm_req;
2193 struct lustre_handle lockh;
2198 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2199 if (dlm_req == NULL)
2202 ldlm_lock2handle(lock, &lockh);
2203 for (i = 0; i < dlm_req->lock_count; i++) {
2204 if (lustre_handle_equal(&dlm_req->lock_handle[i],
2206 DEBUG_REQ(D_RPCTRACE, req,
2207 "Prio raised by lock "LPX64".", lockh.cookie);
2218 static int ldlm_cancel_hpreq_check(struct ptlrpc_request *req)
2220 struct ldlm_request *dlm_req;
2225 /* no prolong in recovery */
2226 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
2229 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2230 if (dlm_req == NULL)
2233 for (i = 0; i < dlm_req->lock_count; i++) {
2234 struct ldlm_lock *lock;
2236 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
2240 rc = !!(lock->l_flags & LDLM_FL_AST_SENT);
2242 LDLM_DEBUG(lock, "hpreq cancel lock");
2243 LDLM_LOCK_PUT(lock);
2252 static struct ptlrpc_hpreq_ops ldlm_cancel_hpreq_ops = {
2253 .hpreq_lock_match = ldlm_cancel_hpreq_lock_match,
2254 .hpreq_check = ldlm_cancel_hpreq_check,
2258 static int ldlm_hpreq_handler(struct ptlrpc_request *req)
2262 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2264 if (req->rq_export == NULL)
2267 if (LDLM_CANCEL == lustre_msg_get_opc(req->rq_reqmsg)) {
2268 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2269 req->rq_ops = &ldlm_cancel_hpreq_ops;
2274 int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2275 cfs_hlist_node_t *hnode, void *data)
2278 cfs_list_t *rpc_list = data;
2279 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2281 lock_res_and_lock(lock);
2283 if (lock->l_req_mode != lock->l_granted_mode) {
2284 unlock_res_and_lock(lock);
2288 LASSERT(lock->l_resource);
2289 if (lock->l_resource->lr_type != LDLM_IBITS &&
2290 lock->l_resource->lr_type != LDLM_PLAIN) {
2291 unlock_res_and_lock(lock);
2295 if (lock->l_flags & LDLM_FL_AST_SENT) {
2296 unlock_res_and_lock(lock);
2300 LASSERT(lock->l_blocking_ast);
2301 LASSERT(!lock->l_blocking_lock);
2303 lock->l_flags |= LDLM_FL_AST_SENT;
2304 if (lock->l_export && lock->l_export->exp_lock_hash) {
2305 /* NB: it's safe to call cfs_hash_del() even lock isn't
2306 * in exp_lock_hash. */
2307 /* In the function below, .hs_keycmp resolves to
2308 * ldlm_export_lock_keycmp() */
2309 /* coverity[overrun-buffer-val] */
2310 cfs_hash_del(lock->l_export->exp_lock_hash,
2311 &lock->l_remote_handle, &lock->l_exp_hash);
2314 cfs_list_add_tail(&lock->l_rk_ast, rpc_list);
2315 LDLM_LOCK_GET(lock);
2317 unlock_res_and_lock(lock);
2321 void ldlm_revoke_export_locks(struct obd_export *exp)
2323 cfs_list_t rpc_list;
2326 CFS_INIT_LIST_HEAD(&rpc_list);
2327 cfs_hash_for_each_empty(exp->exp_lock_hash,
2328 ldlm_revoke_lock_cb, &rpc_list);
2329 ldlm_run_ast_work(exp->exp_obd->obd_namespace, &rpc_list,
2330 LDLM_WORK_REVOKE_AST);
2334 #endif /* HAVE_SERVER_SUPPORT */
2337 static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp)
2339 struct ldlm_bl_work_item *blwi = NULL;
2340 static unsigned int num_bl = 0;
2342 cfs_spin_lock(&blp->blp_lock);
2343 /* process a request from the blp_list at least every blp_num_threads */
2344 if (!cfs_list_empty(&blp->blp_list) &&
2345 (cfs_list_empty(&blp->blp_prio_list) || num_bl == 0))
2346 blwi = cfs_list_entry(blp->blp_list.next,
2347 struct ldlm_bl_work_item, blwi_entry);
2349 if (!cfs_list_empty(&blp->blp_prio_list))
2350 blwi = cfs_list_entry(blp->blp_prio_list.next,
2351 struct ldlm_bl_work_item,
2355 if (++num_bl >= cfs_atomic_read(&blp->blp_num_threads))
2357 cfs_list_del(&blwi->blwi_entry);
2359 cfs_spin_unlock(&blp->blp_lock);
2364 /* This only contains temporary data until the thread starts */
2365 struct ldlm_bl_thread_data {
2366 char bltd_name[CFS_CURPROC_COMM_MAX];
2367 struct ldlm_bl_pool *bltd_blp;
2368 cfs_completion_t bltd_comp;
2372 static int ldlm_bl_thread_main(void *arg);
2374 static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp)
2376 struct ldlm_bl_thread_data bltd = { .bltd_blp = blp };
2379 cfs_init_completion(&bltd.bltd_comp);
2380 rc = cfs_create_thread(ldlm_bl_thread_main, &bltd, 0);
2382 CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %d\n",
2383 cfs_atomic_read(&blp->blp_num_threads), rc);
2386 cfs_wait_for_completion(&bltd.bltd_comp);
2391 static int ldlm_bl_thread_main(void *arg)
2393 struct ldlm_bl_pool *blp;
2397 struct ldlm_bl_thread_data *bltd = arg;
2399 blp = bltd->bltd_blp;
2402 cfs_atomic_inc_return(&blp->blp_num_threads) - 1;
2403 cfs_atomic_inc(&blp->blp_busy_threads);
2405 snprintf(bltd->bltd_name, sizeof(bltd->bltd_name) - 1,
2406 "ldlm_bl_%02d", bltd->bltd_num);
2407 cfs_daemonize(bltd->bltd_name);
2409 cfs_complete(&bltd->bltd_comp);
2410 /* cannot use bltd after this, it is only on caller's stack */
2414 struct l_wait_info lwi = { 0 };
2415 struct ldlm_bl_work_item *blwi = NULL;
2418 blwi = ldlm_bl_get_work(blp);
2421 cfs_atomic_dec(&blp->blp_busy_threads);
2422 l_wait_event_exclusive(blp->blp_waitq,
2423 (blwi = ldlm_bl_get_work(blp)) != NULL,
2425 busy = cfs_atomic_inc_return(&blp->blp_busy_threads);
2427 busy = cfs_atomic_read(&blp->blp_busy_threads);
2430 if (blwi->blwi_ns == NULL)
2431 /* added by ldlm_cleanup() */
2434 /* Not fatal if racy and have a few too many threads */
2435 if (unlikely(busy < blp->blp_max_threads &&
2436 busy >= cfs_atomic_read(&blp->blp_num_threads) &&
2437 !blwi->blwi_mem_pressure))
2438 /* discard the return value, we tried */
2439 ldlm_bl_thread_start(blp);
2441 if (blwi->blwi_mem_pressure)
2442 cfs_memory_pressure_set();
2444 if (blwi->blwi_count) {
2446 /* The special case when we cancel locks in lru
2447 * asynchronously, we pass the list of locks here.
2448 * Thus locks are marked LDLM_FL_CANCELING, but NOT
2449 * canceled locally yet. */
2450 count = ldlm_cli_cancel_list_local(&blwi->blwi_head,
2453 ldlm_cli_cancel_list(&blwi->blwi_head, count, NULL, 0);
2455 ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
2458 if (blwi->blwi_mem_pressure)
2459 cfs_memory_pressure_clr();
2461 if (blwi->blwi_mode == LDLM_ASYNC)
2462 OBD_FREE(blwi, sizeof(*blwi));
2464 cfs_complete(&blwi->blwi_comp);
2467 cfs_atomic_dec(&blp->blp_busy_threads);
2468 cfs_atomic_dec(&blp->blp_num_threads);
2469 cfs_complete(&blp->blp_comp);
2475 static int ldlm_setup(void);
2476 static int ldlm_cleanup(void);
2478 int ldlm_get_ref(void)
2482 cfs_mutex_lock(&ldlm_ref_mutex);
2483 if (++ldlm_refcount == 1) {
2488 cfs_mutex_unlock(&ldlm_ref_mutex);
2493 void ldlm_put_ref(void)
2496 cfs_mutex_lock(&ldlm_ref_mutex);
2497 if (ldlm_refcount == 1) {
2498 int rc = ldlm_cleanup();
2500 CERROR("ldlm_cleanup failed: %d\n", rc);
2506 cfs_mutex_unlock(&ldlm_ref_mutex);
2512 * Export handle<->lock hash operations.
2515 ldlm_export_lock_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2517 return cfs_hash_u64_hash(((struct lustre_handle *)key)->cookie, mask);
2521 ldlm_export_lock_key(cfs_hlist_node_t *hnode)
2523 struct ldlm_lock *lock;
2525 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2526 return &lock->l_remote_handle;
2530 ldlm_export_lock_keycpy(cfs_hlist_node_t *hnode, void *key)
2532 struct ldlm_lock *lock;
2534 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2535 lock->l_remote_handle = *(struct lustre_handle *)key;
2539 ldlm_export_lock_keycmp(const void *key, cfs_hlist_node_t *hnode)
2541 return lustre_handle_equal(ldlm_export_lock_key(hnode), key);
2545 ldlm_export_lock_object(cfs_hlist_node_t *hnode)
2547 return cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2551 ldlm_export_lock_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2553 struct ldlm_lock *lock;
2555 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2556 LDLM_LOCK_GET(lock);
2560 ldlm_export_lock_put(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2562 struct ldlm_lock *lock;
2564 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2565 LDLM_LOCK_RELEASE(lock);
2568 static cfs_hash_ops_t ldlm_export_lock_ops = {
2569 .hs_hash = ldlm_export_lock_hash,
2570 .hs_key = ldlm_export_lock_key,
2571 .hs_keycmp = ldlm_export_lock_keycmp,
2572 .hs_keycpy = ldlm_export_lock_keycpy,
2573 .hs_object = ldlm_export_lock_object,
2574 .hs_get = ldlm_export_lock_get,
2575 .hs_put = ldlm_export_lock_put,
2576 .hs_put_locked = ldlm_export_lock_put,
2579 int ldlm_init_export(struct obd_export *exp)
2583 exp->exp_lock_hash =
2584 cfs_hash_create(obd_uuid2str(&exp->exp_client_uuid),
2585 HASH_EXP_LOCK_CUR_BITS,
2586 HASH_EXP_LOCK_MAX_BITS,
2587 HASH_EXP_LOCK_BKT_BITS, 0,
2588 CFS_HASH_MIN_THETA, CFS_HASH_MAX_THETA,
2589 &ldlm_export_lock_ops,
2590 CFS_HASH_DEFAULT | CFS_HASH_REHASH_KEY |
2591 CFS_HASH_NBLK_CHANGE);
2593 if (!exp->exp_lock_hash)
2598 EXPORT_SYMBOL(ldlm_init_export);
2600 void ldlm_destroy_export(struct obd_export *exp)
2603 cfs_hash_putref(exp->exp_lock_hash);
2604 exp->exp_lock_hash = NULL;
2606 ldlm_destroy_flock_export(exp);
2609 EXPORT_SYMBOL(ldlm_destroy_export);
2611 static int ldlm_setup(void)
2613 static struct ptlrpc_service_conf conf;
2614 struct ldlm_bl_pool *blp = NULL;
2621 if (ldlm_state != NULL)
2624 OBD_ALLOC(ldlm_state, sizeof(*ldlm_state));
2625 if (ldlm_state == NULL)
2629 rc = ldlm_proc_setup();
2634 memset(&conf, 0, sizeof(conf));
2635 conf = (typeof(conf)) {
2636 .psc_name = "ldlm_cbd",
2637 .psc_watchdog_factor = 2,
2639 .bc_nbufs = LDLM_NBUFS,
2640 .bc_buf_size = LDLM_BUFSIZE,
2641 .bc_req_max_size = LDLM_MAXREQSIZE,
2642 .bc_rep_max_size = LDLM_MAXREPSIZE,
2643 .bc_req_portal = LDLM_CB_REQUEST_PORTAL,
2644 .bc_rep_portal = LDLM_CB_REPLY_PORTAL,
2647 .tc_thr_name = "ldlm_cb",
2648 .tc_thr_factor = LDLM_THR_FACTOR,
2649 .tc_nthrs_init = LDLM_NTHRS_INIT,
2650 .tc_nthrs_base = LDLM_NTHRS_BASE,
2651 .tc_nthrs_max = LDLM_NTHRS_MAX,
2652 .tc_nthrs_user = ldlm_num_threads,
2653 .tc_cpu_affinity = 1,
2654 .tc_ctx_tags = LCT_MD_THREAD | LCT_DT_THREAD,
2657 .cc_pattern = ldlm_cpts,
2660 .so_req_handler = ldlm_callback_handler,
2663 ldlm_state->ldlm_cb_service = \
2664 ptlrpc_register_service(&conf, ldlm_svc_proc_dir);
2665 if (IS_ERR(ldlm_state->ldlm_cb_service)) {
2666 CERROR("failed to start service\n");
2667 rc = PTR_ERR(ldlm_state->ldlm_cb_service);
2668 ldlm_state->ldlm_cb_service = NULL;
2672 #ifdef HAVE_SERVER_SUPPORT
2673 memset(&conf, 0, sizeof(conf));
2674 conf = (typeof(conf)) {
2675 .psc_name = "ldlm_canceld",
2676 .psc_watchdog_factor = 6,
2678 .bc_nbufs = LDLM_NBUFS,
2679 .bc_buf_size = LDLM_BUFSIZE,
2680 .bc_req_max_size = LDLM_MAXREQSIZE,
2681 .bc_rep_max_size = LDLM_MAXREPSIZE,
2682 .bc_req_portal = LDLM_CANCEL_REQUEST_PORTAL,
2683 .bc_rep_portal = LDLM_CANCEL_REPLY_PORTAL,
2687 .tc_thr_name = "ldlm_cn",
2688 .tc_thr_factor = LDLM_THR_FACTOR,
2689 .tc_nthrs_init = LDLM_NTHRS_INIT,
2690 .tc_nthrs_base = LDLM_NTHRS_BASE,
2691 .tc_nthrs_max = LDLM_NTHRS_MAX,
2692 .tc_nthrs_user = ldlm_num_threads,
2693 .tc_cpu_affinity = 1,
2694 .tc_ctx_tags = LCT_MD_THREAD | \
2699 .cc_pattern = ldlm_cpts,
2702 .so_req_handler = ldlm_cancel_handler,
2703 .so_hpreq_handler = ldlm_hpreq_handler,
2706 ldlm_state->ldlm_cancel_service = \
2707 ptlrpc_register_service(&conf, ldlm_svc_proc_dir);
2708 if (IS_ERR(ldlm_state->ldlm_cancel_service)) {
2709 CERROR("failed to start service\n");
2710 rc = PTR_ERR(ldlm_state->ldlm_cancel_service);
2711 ldlm_state->ldlm_cancel_service = NULL;
2716 OBD_ALLOC(blp, sizeof(*blp));
2718 GOTO(out, rc = -ENOMEM);
2719 ldlm_state->ldlm_bl_pool = blp;
2721 cfs_spin_lock_init(&blp->blp_lock);
2722 CFS_INIT_LIST_HEAD(&blp->blp_list);
2723 CFS_INIT_LIST_HEAD(&blp->blp_prio_list);
2724 cfs_waitq_init(&blp->blp_waitq);
2725 cfs_atomic_set(&blp->blp_num_threads, 0);
2726 cfs_atomic_set(&blp->blp_busy_threads, 0);
2729 if (ldlm_num_threads == 0) {
2730 blp->blp_min_threads = LDLM_NTHRS_INIT;
2731 blp->blp_max_threads = LDLM_NTHRS_MAX;
2733 blp->blp_min_threads = blp->blp_max_threads = \
2734 min_t(int, LDLM_NTHRS_MAX, max_t(int, LDLM_NTHRS_INIT,
2738 for (i = 0; i < blp->blp_min_threads; i++) {
2739 rc = ldlm_bl_thread_start(blp);
2744 # ifdef HAVE_SERVER_SUPPORT
2745 CFS_INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
2746 expired_lock_thread.elt_state = ELT_STOPPED;
2747 cfs_waitq_init(&expired_lock_thread.elt_waitq);
2749 CFS_INIT_LIST_HEAD(&waiting_locks_list);
2750 cfs_spin_lock_init(&waiting_locks_spinlock);
2751 cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, 0);
2753 rc = cfs_create_thread(expired_lock_main, NULL, CFS_DAEMON_FLAGS);
2755 CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
2759 cfs_wait_event(expired_lock_thread.elt_waitq,
2760 expired_lock_thread.elt_state == ELT_READY);
2761 # endif /* HAVE_SERVER_SUPPORT */
2763 rc = ldlm_pools_init();
2765 CERROR("Failed to initialize LDLM pools: %d\n", rc);
2776 static int ldlm_cleanup(void)
2780 if (!cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) ||
2781 !cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) {
2782 CERROR("ldlm still has namespaces; clean these up first.\n");
2783 ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
2784 ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
2791 if (ldlm_state->ldlm_bl_pool != NULL) {
2792 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
2794 while (cfs_atomic_read(&blp->blp_num_threads) > 0) {
2795 struct ldlm_bl_work_item blwi = { .blwi_ns = NULL };
2797 cfs_init_completion(&blp->blp_comp);
2799 cfs_spin_lock(&blp->blp_lock);
2800 cfs_list_add_tail(&blwi.blwi_entry, &blp->blp_list);
2801 cfs_waitq_signal(&blp->blp_waitq);
2802 cfs_spin_unlock(&blp->blp_lock);
2804 cfs_wait_for_completion(&blp->blp_comp);
2807 OBD_FREE(blp, sizeof(*blp));
2809 #endif /* __KERNEL__ */
2811 if (ldlm_state->ldlm_cb_service != NULL)
2812 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2813 # ifdef HAVE_SERVER_SUPPORT
2814 if (ldlm_state->ldlm_cancel_service != NULL)
2815 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2819 ldlm_proc_cleanup();
2821 # ifdef HAVE_SERVER_SUPPORT
2822 if (expired_lock_thread.elt_state != ELT_STOPPED) {
2823 expired_lock_thread.elt_state = ELT_TERMINATE;
2824 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
2825 cfs_wait_event(expired_lock_thread.elt_waitq,
2826 expired_lock_thread.elt_state == ELT_STOPPED);
2829 #endif /* __KERNEL__ */
2831 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2839 cfs_mutex_init(&ldlm_ref_mutex);
2840 cfs_mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER));
2841 cfs_mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
2842 ldlm_resource_slab = cfs_mem_cache_create("ldlm_resources",
2843 sizeof(struct ldlm_resource), 0,
2844 CFS_SLAB_HWCACHE_ALIGN);
2845 if (ldlm_resource_slab == NULL)
2848 ldlm_lock_slab = cfs_mem_cache_create("ldlm_locks",
2849 sizeof(struct ldlm_lock), 0,
2850 CFS_SLAB_HWCACHE_ALIGN | SLAB_DESTROY_BY_RCU);
2851 if (ldlm_lock_slab == NULL) {
2852 cfs_mem_cache_destroy(ldlm_resource_slab);
2856 ldlm_interval_slab = cfs_mem_cache_create("interval_node",
2857 sizeof(struct ldlm_interval),
2858 0, CFS_SLAB_HWCACHE_ALIGN);
2859 if (ldlm_interval_slab == NULL) {
2860 cfs_mem_cache_destroy(ldlm_resource_slab);
2861 cfs_mem_cache_destroy(ldlm_lock_slab);
2864 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2865 class_export_dump_hook = ldlm_dump_export_locks;
2870 void ldlm_exit(void)
2874 CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
2875 rc = cfs_mem_cache_destroy(ldlm_resource_slab);
2876 LASSERTF(rc == 0, "couldn't free ldlm resource slab\n");
2878 /* ldlm_lock_put() use RCU to call ldlm_lock_free, so need call
2879 * synchronize_rcu() to wait a grace period elapsed, so that
2880 * ldlm_lock_free() get a chance to be called. */
2883 rc = cfs_mem_cache_destroy(ldlm_lock_slab);
2884 LASSERTF(rc == 0, "couldn't free ldlm lock slab\n");
2885 rc = cfs_mem_cache_destroy(ldlm_interval_slab);
2886 LASSERTF(rc == 0, "couldn't free interval node slab\n");
2890 EXPORT_SYMBOL(ldlm_extent_shift_kms);
2893 #ifdef HAVE_SERVER_SUPPORT
2894 EXPORT_SYMBOL(ldlm_get_processing_policy);
2896 EXPORT_SYMBOL(ldlm_lock2desc);
2897 EXPORT_SYMBOL(ldlm_register_intent);
2898 EXPORT_SYMBOL(ldlm_lockname);
2899 EXPORT_SYMBOL(ldlm_typename);
2900 EXPORT_SYMBOL(ldlm_lock2handle);
2901 EXPORT_SYMBOL(__ldlm_handle2lock);
2902 EXPORT_SYMBOL(ldlm_lock_get);
2903 EXPORT_SYMBOL(ldlm_lock_put);
2904 EXPORT_SYMBOL(ldlm_lock_match);
2905 EXPORT_SYMBOL(ldlm_lock_cancel);
2906 EXPORT_SYMBOL(ldlm_lock_addref);
2907 EXPORT_SYMBOL(ldlm_lock_addref_try);
2908 EXPORT_SYMBOL(ldlm_lock_decref);
2909 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
2910 EXPORT_SYMBOL(ldlm_lock_change_resource);
2911 EXPORT_SYMBOL(ldlm_it2str);
2912 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2913 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
2914 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
2915 EXPORT_SYMBOL(ldlm_lock_allow_match);
2916 EXPORT_SYMBOL(ldlm_lock_downgrade);
2917 EXPORT_SYMBOL(ldlm_lock_convert);
2919 /* ldlm_request.c */
2920 EXPORT_SYMBOL(ldlm_completion_ast_async);
2921 EXPORT_SYMBOL(ldlm_blocking_ast_nocheck);
2922 EXPORT_SYMBOL(ldlm_completion_ast);
2923 EXPORT_SYMBOL(ldlm_blocking_ast);
2924 EXPORT_SYMBOL(ldlm_glimpse_ast);
2925 EXPORT_SYMBOL(ldlm_expired_completion_wait);
2926 EXPORT_SYMBOL(ldlm_prep_enqueue_req);
2927 EXPORT_SYMBOL(ldlm_prep_elc_req);
2928 EXPORT_SYMBOL(ldlm_cli_convert);
2929 EXPORT_SYMBOL(ldlm_cli_enqueue);
2930 EXPORT_SYMBOL(ldlm_cli_enqueue_fini);
2931 EXPORT_SYMBOL(ldlm_cli_enqueue_local);
2932 EXPORT_SYMBOL(ldlm_cli_cancel);
2933 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
2934 EXPORT_SYMBOL(ldlm_cli_cancel_unused_resource);
2935 EXPORT_SYMBOL(ldlm_cli_cancel_req);
2936 EXPORT_SYMBOL(ldlm_replay_locks);
2937 EXPORT_SYMBOL(ldlm_resource_foreach);
2938 EXPORT_SYMBOL(ldlm_namespace_foreach);
2939 EXPORT_SYMBOL(ldlm_resource_iterate);
2940 EXPORT_SYMBOL(ldlm_cancel_resource_local);
2941 EXPORT_SYMBOL(ldlm_cli_cancel_list_local);
2942 EXPORT_SYMBOL(ldlm_cli_cancel_list);
2945 #ifdef HAVE_SERVER_SUPPORT
2946 EXPORT_SYMBOL(ldlm_server_blocking_ast);
2947 EXPORT_SYMBOL(ldlm_server_completion_ast);
2948 EXPORT_SYMBOL(ldlm_server_glimpse_ast);
2949 EXPORT_SYMBOL(ldlm_glimpse_locks);
2950 EXPORT_SYMBOL(ldlm_handle_enqueue);
2951 EXPORT_SYMBOL(ldlm_handle_enqueue0);
2952 EXPORT_SYMBOL(ldlm_handle_cancel);
2953 EXPORT_SYMBOL(ldlm_request_cancel);
2954 EXPORT_SYMBOL(ldlm_handle_convert);
2955 EXPORT_SYMBOL(ldlm_handle_convert0);
2956 EXPORT_SYMBOL(ldlm_revoke_export_locks);
2958 EXPORT_SYMBOL(ldlm_del_waiting_lock);
2959 EXPORT_SYMBOL(ldlm_get_ref);
2960 EXPORT_SYMBOL(ldlm_put_ref);
2961 EXPORT_SYMBOL(ldlm_refresh_waiting_lock);
2963 /* ldlm_resource.c */
2964 EXPORT_SYMBOL(ldlm_namespace_new);
2965 EXPORT_SYMBOL(ldlm_namespace_cleanup);
2966 EXPORT_SYMBOL(ldlm_namespace_free);
2967 EXPORT_SYMBOL(ldlm_namespace_dump);
2968 EXPORT_SYMBOL(ldlm_dump_all_namespaces);
2969 EXPORT_SYMBOL(ldlm_resource_get);
2970 EXPORT_SYMBOL(ldlm_resource_putref);
2971 EXPORT_SYMBOL(ldlm_resource_unlink_lock);
2974 EXPORT_SYMBOL(client_import_add_conn);
2975 EXPORT_SYMBOL(client_import_del_conn);
2976 EXPORT_SYMBOL(client_obd_setup);
2977 EXPORT_SYMBOL(client_obd_cleanup);
2978 EXPORT_SYMBOL(client_connect_import);
2979 EXPORT_SYMBOL(client_disconnect_export);
2980 EXPORT_SYMBOL(target_send_reply);
2981 EXPORT_SYMBOL(target_pack_pool_reply);
2983 #ifdef HAVE_SERVER_SUPPORT
2984 EXPORT_SYMBOL(server_disconnect_export);
2985 EXPORT_SYMBOL(target_stop_recovery_thread);
2986 EXPORT_SYMBOL(target_handle_connect);
2987 EXPORT_SYMBOL(target_cleanup_recovery);
2988 EXPORT_SYMBOL(target_destroy_export);
2989 EXPORT_SYMBOL(target_cancel_recovery_timer);
2990 EXPORT_SYMBOL(target_queue_recovery_request);
2991 EXPORT_SYMBOL(target_handle_ping);
2992 EXPORT_SYMBOL(target_handle_disconnect);
2996 EXPORT_SYMBOL(lock_res_and_lock);
2997 EXPORT_SYMBOL(unlock_res_and_lock);